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24 Castle St

Telegraph Hill, SF 94133 0114045 2 units · 1 fl · 1907

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Telegraph Hill
At or below average
avg 1.2
0
FewerMore

This building has 0 novs (7y), at or below the Telegraph Hill average of 1.2.

Rent & eviction protection

Is 24 Castle St rent-controlled?

San Francisco's Rent Ordinance caps rent increases and provides eviction protection for most residential units built before 1979 with 2+ units. Here's how this building scores.

Built before 1979
Built 1907
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH3
Likely rent-controlled. Building age and unit count suggest this property falls under San Francisco's Rent Ordinance.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Building characteristics
Units2
Floors1
Year built1907
Total area1,097 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0114045
Ownership

Registered owner per SF Assessor-Recorder (secured roll).

Owner name
Lew Clarence & Pui Shan
Mailing address
24 Castle St San Francisco CA 94133
Last sale
060518

Landlord portfolio

Other SF properties this owner holds, with risk grades for each.

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Augrented Insights
Initial analysis

The two-unit residential building at 24 Castle Street in Telegraph Hill, owned by Clarence Lew and Pui Shan, has undergone several significant improvements since 2013, enhancing both its functionality and energy efficiency. The most substantial renovation work occurred in 2013-2014, focusing on the upper level with a comprehensive kitchen renovation and bathroom addition (approximately 165 sq ft), which included electrical upgrades (installation of 12 lights, 5 switches, multiple outlets, and new appliances) and plumbing fixtures (new sink, stove, bathroom facilities). During this period, the building also received a major electrical service upgrade to 200 amps and the installation of energy-efficient windows, replacing four street-facing windows with double-hung wood windows featuring a U-factor less than 0.32.

More recent improvements include the installation of a high-efficiency gas furnace (40,000 BTU, 95% efficiency) with new air ducts in 2016, demonstrating continued investment in the building's systems. The most recent building permit on record from March 2015 indicates completion of previously approved work, with no outstanding permits or violations noted. The building, constructed in 1907 and classified as a Flats & Duplex structure, has maintained its residential classification throughout these improvements, all of which have been properly permitted and completed according to available records, with the exception of one expired permit from 2013 that was ultimately not pursued.

AI-generated · may contain errors · check the source data tables below

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Risk rating

How 24 Castle St's risk score is calculated

We trained a model on 7 years of SF DBI inspection data — notice of violation filings, complaint history, and owner track records. It estimates the probability that DBI inspectors will issue a Notice of Violation at this address in the next 12 months. Lower % = safer.

What the score means for you

Grade A–B — Low risk

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Grade C — Moderate risk

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Grade D–F — High risk

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
67th percentile

Out of 684 buildings in this neighborhood, 226 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
89%
No DBI
violation
11%
DBI violation
likely
Model explanation

What's driving this score

The three data points that most influenced this building's risk rating — ranked by the weight the model placed on each one.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Number of floors

Building height affects maintenance complexity and is one of the size signals the model uses.

12-Month severity forecast
No violation 87.3%
Moderate concern 7.3%
Severe concern 5.4%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

24 Castle St event timeline

Violations, complaints, fire incidents, permits, and buyouts — most recent records in order.

No dated public records on file yet.
Every record we have

Full data for 24 Castle St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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